ジャーナル: Science / 年: 2018 タイトル: Structures of human PRC2 with its cofactors AEBP2 and JARID2. 著者: Vignesh Kasinath / Marco Faini / Simon Poepsel / Dvir Reif / Xinyu Ashlee Feng / Goran Stjepanovic / Ruedi Aebersold / Eva Nogales / 要旨: Transcriptionally repressive histone H3 lysine 27 methylation by Polycomb repressive complex 2 (PRC2) is essential for cellular differentiation and development. Here we report cryo-electron ...Transcriptionally repressive histone H3 lysine 27 methylation by Polycomb repressive complex 2 (PRC2) is essential for cellular differentiation and development. Here we report cryo-electron microscopy structures of human PRC2 in a basal state and two distinct active states while in complex with its cofactors JARID2 and AEBP2. Both cofactors mimic the binding of histone H3 tails. JARID2, methylated by PRC2, mimics a methylated H3 tail to stimulate PRC2 activity, whereas AEBP2 interacts with the RBAP48 subunit, mimicking an unmodified H3 tail. SUZ12 interacts with all other subunits within the assembly and thus contributes to the stability of the complex. Our analysis defines the complete architecture of a functionally relevant PRC2 and provides a structural framework to understand its regulation by cofactors, histone tails, and RNA.
PolycombproteinSUZ12 / ポリコーム群タンパク質 / Chromatin precipitated E2F target 9 protein / ChET 9 protein / Joined to JAZF1 protein / Suppressor ...Chromatin precipitated E2F target 9 protein / ChET 9 protein / Joined to JAZF1 protein / Suppressor of zeste 12 protein homolog
分子量: 83181.922 Da / 分子数: 3 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: SUZ12, CHET9, JJAZ1, KIAA0160 / 発現宿主: Trichoplusia ni (イラクサキンウワバ) / 参照: UniProt: Q15022
#5: タンパク質
PolycombproteinEED / / hEED / Embryonic ectoderm development protein / WD protein associating with integrin cytoplasmic ...hEED / Embryonic ectoderm development protein / WD protein associating with integrin cytoplasmic tails 1 / WAIT-1
分子量: 50267.691 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: EED / 発現宿主: Trichoplusia ni (イラクサキンウワバ) / 参照: UniProt: O75530
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タンパク質 , 6種, 7分子 BEKCNPZ
#2: タンパク質
ProteinJumonji / Jumonji/ARID domain-containing protein 2
分子量: 37706.449 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: JARID2, JMJ / 発現宿主: Trichoplusia ni (イラクサキンウワバ) / 参照: UniProt: Q92833
#3: タンパク質
ProteinJumonji / Jumonji/ARID domain-containing protein 2
分子量: 37664.371 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: JARID2, JMJ / 発現宿主: Trichoplusia ni (イラクサキンウワバ) / 参照: UniProt: Q92833
分子量: 85492.297 Da / 分子数: 2 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: EZH2, KMT6 / 発現宿主: Trichoplusia ni (イラクサキンウワバ) 参照: UniProt: Q15910, ヒストンメチルトランスフェラーゼ
#6: タンパク質
Histone-bindingproteinRBBP4 / Chromatin assembly factor 1 subunit C / CAF-1 subunit C / Chromatin assembly factor I p48 subunit / ...Chromatin assembly factor 1 subunit C / CAF-1 subunit C / Chromatin assembly factor I p48 subunit / CAF-I p48 / Nucleosome-remodeling factor subunit RBAP48 / Retinoblastoma-binding protein 4 / RBBP-4 / Retinoblastoma-binding protein p48
分子量: 47709.527 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: RBBP4, RBAP48 / 発現宿主: Trichoplusia ni (イラクサキンウワバ) / 参照: UniProt: Q09028
#8: タンパク質
ZincfingerproteinAEBP2 / ジンクフィンガー / Adipocyte enhancer-binding protein 2 / AE-binding protein 2
分子量: 33012.668 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: AEBP2 / 発現宿主: Trichoplusia ni (イラクサキンウワバ) / 参照: UniProt: Q6ZN18
#9: タンパク質
SUZ12
分子量: 11507.176 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 発現宿主: Trichoplusia ni (イラクサキンウワバ)
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タンパク質・ペプチド , 1種, 1分子 O
#7: タンパク質・ペプチド
JARID2-substrate
分子量: 735.874 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 発現宿主: Trichoplusia ni (イラクサキンウワバ)
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詳細
配列の詳細
authors have indicated that the macromolecule name is corresponding to chain Z is SUZ12. The ...authors have indicated that the macromolecule name is corresponding to chain Z is SUZ12. The expected sequence for this portion is: SUZ12 aa 150 - 356 SHSLSAHLQLTFTGFFHKNDKPSPNSENEQNSVTLEVLLVKVCHKKRKDVSCPIRQVPTGKKQVPLNPDLNQTKPGNFPSLAVSSNEFEPSNSHMVKSYSLLFRVTRPGRREFNGMINGETNENIDVNEELPARRKRNREDGEKTFVAQMTVFDKNRRLQLLDGEYEVAMQEMEECPISKKRATWETILDGKRLPPFETFSQGPTLQ
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実験情報
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実験
実験
手法: 電子顕微鏡法
EM実験
試料の集合状態: PARTICLE / 3次元再構成法: 単粒子再構成法
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試料調製
構成要素
名称: Ternary complex of PRC2 with cofactors AEBP2 and JARID2 タイプ: COMPLEX / Entity ID: all / 由来: RECOMBINANT
解像度: 3.5 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 249696 / 対称性のタイプ: POINT
精密化
解像度: 3.5→151.2 Å / Cor.coef. Fo:Fc: 0.843 / SU B: 29.608 / SU ML: 0.428 / ESU R: 0.808 立体化学のターゲット値: MAXIMUM LIKELIHOOD WITH PHASES 詳細: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
Rfactor
反射数
%反射
Rwork
0.35739
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obs
0.35739
85373
100 %
溶媒の処理
イオンプローブ半径: 0.8 Å / 減衰半径: 0.8 Å / VDWプローブ半径: 1.2 Å / 溶媒モデル: MASK